All I can say is:
800 grit
Then
1000 grit
Then
1500 Grit.
Then install, and realize they they don't fit and need all sorts of shit changed because of the massive lift.
Also, if they do work, then I'm assuming you have an engine that will rev to 9,000rpm to 10,000rpm because those cams will only be good from about 5,000rpm upwards.
Still surprised at people that think bigger is always better when it comes to cams.